diff options
Diffstat (limited to 'librpc/ndr/ndr_sec_helper.c')
| -rw-r--r-- | librpc/ndr/ndr_sec_helper.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/librpc/ndr/ndr_sec_helper.c b/librpc/ndr/ndr_sec_helper.c new file mode 100644 index 0000000000..4b135505d8 --- /dev/null +++ b/librpc/ndr/ndr_sec_helper.c @@ -0,0 +1,118 @@ +/* + Unix SMB/CIFS implementation. + + fast routines for getting the wire size of security objects + + Copyright (C) Andrew Tridgell 2003 + Copyright (C) Stefan Metzmacher 2006-2008 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + + +#include "includes.h" +#include "librpc/gen_ndr/ndr_security.h" + +/* + return the wire size of a security_ace +*/ +size_t ndr_size_security_ace(const struct security_ace *ace, int flags) +{ + size_t ret; + + if (!ace) return 0; + + ret = 8 + ndr_size_dom_sid(&ace->trustee, flags); + + switch (ace->type) { + case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT: + case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT: + case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT: + case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT: + ret += 4; /* uint32 bitmap ace->object.object.flags */ + if (ace->object.object.flags & SEC_ACE_OBJECT_TYPE_PRESENT) { + ret += 16; /* GUID ace->object.object.type.type */ + } + if (ace->object.object.flags & SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT) { + ret += 16; /* GUID ace->object.object.inherited_typeinherited_type */ + } + break; + default: + break; + } + + return ret; +} + +enum ndr_err_code ndr_pull_security_ace(struct ndr_pull *ndr, int ndr_flags, struct security_ace *r) +{ + if (ndr_flags & NDR_SCALARS) { + uint32_t start_ofs = ndr->offset; + uint32_t size = 0; + uint32_t pad = 0; + NDR_CHECK(ndr_pull_align(ndr, 4)); + NDR_CHECK(ndr_pull_security_ace_type(ndr, NDR_SCALARS, &r->type)); + NDR_CHECK(ndr_pull_security_ace_flags(ndr, NDR_SCALARS, &r->flags)); + NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &r->size)); + NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->access_mask)); + NDR_CHECK(ndr_pull_set_switch_value(ndr, &r->object, r->type)); + NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_SCALARS, &r->object)); + NDR_CHECK(ndr_pull_dom_sid(ndr, NDR_SCALARS, &r->trustee)); + size = ndr->offset - start_ofs; + if (r->size < size) { + return ndr_pull_error(ndr, NDR_ERR_BUFSIZE, + "ndr_pull_security_ace: r->size %u < size %u", + (unsigned)r->size, size); + } + pad = r->size - size; + NDR_PULL_NEED_BYTES(ndr, pad); + ndr->offset += pad; + } + if (ndr_flags & NDR_BUFFERS) { + NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_BUFFERS, &r->object)); + } + return NDR_ERR_SUCCESS; +} + +/* + return the wire size of a security_acl +*/ +size_t ndr_size_security_acl(const struct security_acl *acl, int flags) +{ + size_t ret; + int i; + if (!acl) return 0; + ret = 8; + for (i=0;i<acl->num_aces;i++) { + ret += ndr_size_security_ace(&acl->aces[i], flags); + } + return ret; +} + +/* + return the wire size of a security descriptor +*/ +size_t ndr_size_security_descriptor(const struct security_descriptor *sd, int flags) +{ + size_t ret; + if (!sd) return 0; + + ret = 20; + ret += ndr_size_dom_sid(sd->owner_sid, flags); + ret += ndr_size_dom_sid(sd->group_sid, flags); + ret += ndr_size_security_acl(sd->dacl, flags); + ret += ndr_size_security_acl(sd->sacl, flags); + return ret; +} + |